How long have we been waiting for Joss Whedon's movie, The Cabin in the Woods? It doesn't matter because we're going to have to wait another year.
MGM has pushed back the opening of The Cabin in the Woods from February 5th, 2010 to January 14th, 2011 because they've decided to convert The Cabin in the Woods to 3-D.
MGM has been noted in saying that the early response to The Cabin in the Woods has been so good that they've made the decision to convert the film to 3D since 3D is a great platform for horror flicks.
Of course, if 3D is going to look as good as it could, it usually needs to be applied while they're filming a project, not at post-production time. I'm not holding my breath on this.
This seems odd to this fervent Joss Whedon fan and I haven't seen any press on any statement that Joss Whedon might have made in reaction to this schedule change-up yet.
Source: Shock Till You Drop